A large cloud of hydrogen gas called a filament erupts from the sun on June 19, 2014. We normally see these fiery gas clouds along the sun’s limb as pink flames. Here it shows in silhouette.
Welcome to the first day of summer! The new season’s first night may just bring us a blush of northern lights. A filament – another name a solar prominence except seen in silhouette against the sun’s bright disk – erupted from the sun’s southern hemisphere Thursday. Flung into space because of some magnetic disturbance, most of the material shot off to the northeast, but some was Earth-directed. It should arrive overnight and possibly set off a minor aurora storm.
NOAA forecasters are calling for a 25% chance of a minor storm for mid-northern latitudes tonight and a 20% chance Sunday night.
The picture above showing the coronal mass ejection was taken with the Solar and Heliospheric Observatory’s coronagraph, a special camera with an occulting disk that blocks direct sunlight so astronomers can see what’s going on around the sun. Photos taken today with the instrument show a new visitor – Comet Jacques. You can watch it enter the field of view at lower left.
Amateur astronomer Rob Kaufman compiled multiple still photos into a video showing the ‘blip’ on the move. It’s currently around magnitude 7, but once it passes the sun and moves into the morning sky next month, it may be bright enough to spot in binoculars. More on that as the time approaches.
Another erupting filament photographed late Friday night June 20 with NASA’s Solar Dynamics telescope.